Residual Stress Analysis in Compositional Gradient Ti + HA Coatings on Ti6Al4V Substrates for Biomedical Applications

Article type: Research Article

Authors: Manescu, A.^; | Albertini, G.^; | Fogarassy, P. | Lodini, A. | Markocsan, N.

Affiliations: Dipartimento di Scienze Applicate ai Sistemi Complessi, Politechnical University of Marche, Via Ranieri 65, Ancona, Italy | INFM, Ancona Unit, Via Brecce Bianche, Ancona, 60100, Italy | Department of Physics, Materials and Soil Engineering, Politechnical University of Marche, Via Brecce Bianche, Ancona, 60100, Italy | LACM, Université de Reims Champagne-Ardenne, BP 1039, 51687 Reims Cedex 2, France | University of Trollhattan/Uddevalla, Gärdhemsvägen 4, SE-461 29 Trollhättan, Sweden

Note: [] Corresponding author. Tel.: +39-71-220-4603. Fax: +39-71-220-4605. E-mail: [email protected]

Abstract: The residual stresses for different Ti + hydroxyapatite (HA) compositional gradient coatings on Ti6Al4V substrates were analysed by means of synchrotron radiation measurements. The samples were obtained by plasma spraying using different plasma spraying parameters for the different layers and coatings. A finite element model (FEM) was developed and a comparison between the theoretical FEM predictions and the experimental values was done. The influence of the plasma spraying parameters on the stresses was studied. The stress in a pure HA coating on Ti6Al4V substrate was measured and compared with those in the HA layers of the compositional gradient coatings.

Keywords: Implants, Compositional gradient coatings, Plasma spraying, Residual stress, Finite element analysis

DOI: 10.1080/10238160410001734603

Journal: Journal of Neutron Research, vol. 12, no. 1-3, pp. 147-152, 2004